Door stop



FIG. 1 is an oblique view of a door stop showing our new design;

FIG. 2 is a left side elevation view thereof, the right side elevation view being a mirror image of the left side elevation view;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a front elevation view thereof; and,

FIG. 5 is a top plan view thereof, the bottom view being identical to the top plan view. 

CLAIM The ornamental design for a door stop, as shown and described. 